Spiro(imidazolidinoquinazolinones), obtained easily in one step from 1-carbamoylisatins, are readily converted in three steps by successive N-alkylations and sodium borohydride regioselective reduction into the corresponding hydroxyspirolactams. The latter are valuable platforms for further transformations via the intermediacy of N-acyliminium species and have been applied to the synthesis of original isoquinoloquinazoline, indoloquinazoline and imidazoindole derivatives.
从 1-
氨基甲酰基利萨丁一步即可轻松获得螺(
咪唑烷基
喹唑啉酮),通过连续的 N-烷基化和
硼氢化钠区域选择性还原,可分三步轻松转化为相应的羟基
吡咯内酰胺。后者是通过 N-
酰亚胺中间体进行进一步转化的重要平台,已被用于合成原始的异
喹唑啉、
吲哚喹唑啉和
咪唑吲哚衍
生物。